Abb Technology Ag

Abb Ab

Philip C Kjaer

Per Larsson

Stefan Valdemarsson

Lars E Jonsson

Magnus Backman

Sjoerd Bosga

Lennart Balgård

Per-Olof Thureson

Falah Al-Hosini

Jan Smede

Jan-Anders Nygren Nolemo

Ove Albertsson

The invention concerns a switching device system including at least one switching device, signal means and control means. Each switching device includes at least one mobile contact part, an electric motor and, coupling means. The coupling means is arranged to transfer motion from the electric motor to the mobile contact part. The control means is arranged to control the switching device. According to the invention the control means is at least partly remotely located from the switching device. The signal means transmit signals from the switching device to the remotely located control means and vice/versa. The signals represent real-time data and/or off-line data. The invention concerns also a switching device, control means and methods related to the invented system as well as computer program products for such system and electric power system being provided with such system.

Switching device system, components therefore and methods relating thereto

An electric switching device for alternating current comprises two branches () connected in parallel in a current path and having each at least two contact members () connected in series. A semiconductor device () is adapted to interconnect the midpoints between the two contact members of each branch. When opening the current path a first contact member () of one, first branch located before said midpoint as seen in the current direction existing is controlled to open and a second contact member () of the second branch located after the midpoint as seen in the current direction is controlled to open for transferring the current to a temporary current path through the semiconductor device. The current path through the switching device is then broken when the semiconductor device is in a blocking state by opening a contact member () of the switching device arranged in the temporary current path.

Electric switching device

Growing community of inventors

Västerås, Sweden

Philip C Kjaer